Rav Yosef Zalman Bloch from Monsey

This was posted: Rav Yosef Zalman Bloch of Monsey - Rav Bloch, is a son of the famous Telzer Rosh Yeshiva Rav Elya Meir Bloch - Rav Bloch is well-known for his detailed medical knowledge, and has strongly promoted conventional vaccines in the past